1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index d140e8fb075f..c566927efcbd 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -77,13 +77,15 @@
 
 /*
  * Divide positive or negative dividend by positive divisor and round
- * to closest integer. Result is undefined for negative divisors.
+ * to closest integer. Result is undefined for negative divisors and
+ * for negative dividends if the divisor variable type is unsigned.
  */
 #define DIV_ROUND_CLOSEST(x, divisor)(                  \
 {                                                       \
         typeof(x) __x = x;                              \
         typeof(divisor) __d = divisor;                  \
-        (((typeof(x))-1) > 0 || (__x) > 0) ?            \
+        (((typeof(x))-1) > 0 ||                         \
+         ((typeof(divisor))-1) > 0 || (__x) > 0) ?      \
                 (((__x) + ((__d) / 2)) / (__d)) :       \
                 (((__x) - ((__d) / 2)) / (__d));        \
 }                                                       \